QuoteInterest, nonetheless, is beginning to percolate, said Alex Winch, president of Mondial Energy. Mondial installs solar thermal systems in large buildings and then makes its money by reselling the heat generated by them back to the building owner. The Toronto-based company has put systems in 100-unit senior living centers in Canada, and it recently signed letters of intent for installations in a couple of U.S. hotels. Solar thermal systems can offset gas consumption even in places not known for sunshine, Winch noted. His first project was the Beach Solar Laundromat in Toronto. It's snowy in that city right now, but the system at Beach Solar has generated 382 kilowatts in the past week, according to its online energy meter.